Manufacture of thread



Rl PICARD MANUFACTURE OF THREAD 4 Filed Feb. 28, 1934 Patented May 4, 19 7 2,079,524

UNITED STATES PATENT OFFICE MANUFACTURE OF THREAD Rene Picard, Villeurbanne, France, assignor, by mesne assignments, to E. I. du Pont de Nemours & Company, Wilmington, Del., a corporation of Delaware Application February 28, 1934, Serial No. 713,354 In France March 23, 1933 4 Claims. (01. 18-54) This invention relates to the manufacture of passed over either or both godet wheels. The artificial threads. threads led to the guide are preferably of the Artificial thread, as made by the viscose, ousame, but may be of different, composition; for inprammonium cellulose, or cellulose acetate procstance, either one or both threads may be made 5 esses, is composed of continuous filaments from viscose, cuprammonium cellulose, a cellutwisted together. The resulting thread is eX- lose ester or ether; the composition of viscose tremely smooth and of high luster. In order to used in making two separate threads may be diflower the luster it has heretofore been proposed ferent; either or both threads may be of the to include pigments in the thread or to mar the hollow filament type; the threads may be of the surface of the thread. However, even with these same or of different deniers. If dissimilar l0 treatments the thread lacks much of the soft threads .are used, for instance of regenerated celappearance which is so desirable. lulose and of cellulose acetate, pleasing color ef- An object of this invention is a process of fects can be obtained by dyeing in succession manufacturing artificial thread. Another object with dyes specific to the respective materials.

of the invention is to produce a new thread hav- This softness of appearance can be accentu- 15 ing superior appearance. Other objects of the ated by running the thread, after unwinding invention will be in part apparent and in part from the cake, over an abrasive surface, such hereinafter set forth. as over a bar or guide covered with or composed The objects of the invention are accomplished, of an abrasive material such as emery, carborungenerally speaking, by the use of the bucket spindum, emery cloth, and the like. This abrad- 2o ning method of manufacturing rayon wherein, ing action can be carried out either before or according to my invention, two threads are siafter purification of the material. The thread multaneously spun into one bucket, one of the may or may not have a traverse motion with rethreads being delivered at a higher rate of speed lation to the abrading device. The invention than the other thread. also comprehends the fabrication of unfiuifed 25 In the drawing Figure 1 illustrates one arthread into a fabric and the fiufiing of the fabric rangement of manufacturing thread according by rubbing it with a satisfactory abrasive. to my invention. Figure 2 illustrates another In Figure 2 is shown a slight modification of method of manufacturing thread according to the invention. In that figure a funnel is proy invention vided for each thread. The product obtained is 30 In the drawing 4\4I are threads issuing from substantially the same as that obtained by the beneath the surface of a coagulating bath; 2-2 method described. are the surfaces of coagulating baths; 44| are An advantage of my invention is a new procartificial threads; 33l are godet wheels for ess of manufacturing thread. Another advanfeeding the artificial threads to the guide or tage of the invention is the production of a com- 35 guides, as the case may be, the wheel 3| being pound thread which may for convenience be deof larger diameter than wheel 3; 5 is a reciproscribed as a unit of twisted filaments about which cable funnel guide through which both threads is wound a longer unit of less twisted filaments. pass; 6 is a centrifugal bucket in which the By abrasion the appearance of the thread may thread is formed into .an annular cake. be still further enhanced. 40

The operation of my invention, as exemplified It has heretofore been proposed to wrap one in the above apparatus, is as follows: Two finished thread about another, as in the type of threads are spun according to any known meththread called ratine, but such threads are obod, and are passed over their respective godet viously a compound thread the strands of which wheels and through the guide into the spinning can be easily distinguished and almost as easily 45 bucket. One godet wheel is set to deliver the separated. This is not true of the product which thread faster than the other. This may be done is manufactured by my process in which the by driving identical wheels at different angular separate strands are blended to form a homo-- velocities or by driving wheels of different digeneous appearance, the separate parts of which ameter at the same angular velocity. In either can be distinguished only by closest inspection 50 case there should be a distinct difference in the or not at all. It is, in short, a unit having a rate of delivery of the threads to the guide meohdistinctive and pleasing appearance.

anism; in general the rate of delivery of the As many apparently widely different embodione thread should exceed the other by at least ments of this invention may be made without 30%. Of course, more than one thread may be departing from the spirit and scope thereof, it

is to be understood that I do not limit myself to the specific embodiments thereof except as defined in the appended claims.

I claim:

1. The method of manufacturing thread which comprises wet spinning an artificial thread, forming another artificial thread, and passing said threads into a centrifugal spinning bucket while said wet spun thread is still in the gel state in such a manner as to form a continuous filamentary thread having a longer thread looped around the same, and abrading said longer looped thread.

2. The method of manufacturing thread which comprises wet spinning two separate artificial thread strands, passing said strands into a centrifugal spinning bucket in such a manner as to form a thread composed of a continuous filamentary thread having a longer thread looped around the same while said strands are still in the gel state, drying said composite thread to permanently set the strands relative to each other and abrading said composite thread.

I 3. As a new article of manufacture a composite thread comprising a continuous filamentary thread strand having a longer thread strand looped around the same, said filamentary and looped strands being in a substantially permanently set relationship with each other, and said looped strands being abraded to present a fluiTy appearance.

4. As a new article of manufacture a composite thread comprising a continuous twisted filamentary thread strand having a longer, less twisted thread strand looped around the same, said strands composed of regenerated cellulose and being in a substantially permanently set relationship with each other and said looped threads being abraded to present a fiufiy appearance.

RENE: PICARD. 

